THE MUSCLES OF THE LOWER EXTREMITY. 177 



the cnemial crest of the tibial and the lateral boundaries 

 of the summit of that bone. Some of the superficial 

 muscles on the outer side of the leg are so extended as 

 to take a certain amount of their origin from this great 

 tendinous expansion. 



" In (Fig. 63 bis) I have very thoroughly divided these 

 two subdivisions of the extensor femoris, in order to 

 show their relative size, as well as their relation to each 

 other and the surrounding structures. 3 ' 



o 



100. The semitendinosus l is abroad and flat muscle, 

 which, aided by the semimembranosus beneath it, forms 



1 For interesting accounts of this muscle as it is found in others 

 of the class, see Selenka's myology of Aves (Bronn's Thier-Reichs, 

 vi. Bd. p. 143), and Gadow's excellent chapter on the same sub- 

 ject (loc. cit., pp. 162, 164). The latter writer has called it the 

 Caud.-ilio-flexorius, and both Selenka and Gadow have treated the 

 " M. accessorius semitendinosi" under the same muscle; the last- 

 named is No. 101 of the present work. As heretofore, I republish 

 the synonymy of the semitendinosus from Gadow : 



" 37. M. CAUD-ILIO-FLEXORIUS. 



M. sextus tibiam movens. Aldrovandi. 



M. tertius femoris. Steno. 



Le muscle qui tient la place du demi-membraneux ou du demi- 



nerveux. Yicq d'Azyr, p. 277, No. 2. 

 Hinterer Anzieher des Beines. Merrem, p 159, No. 4. 

 flexor cruris posterior. Wiedemann, p. 96. 

 Flexor cruris tertius s. posterior. Tiedemann, 301. 

 Le muscle demi-nerveux. Cuvier, p. 524. 

 Schienbeinbeuger. Meckel, System, p. 362, No. 3 ; Archiv, p. 269, 



No. 8. 

 Semitendinosus. Owen. 



,, Selenka, p. 143. 



De Man, p. 126, No. 13 ; Quennerstedt, p. 26. 



,, Garrod ; Watson, p. 113. 



Demi-tend ineux. Gervais et Alix, p. 32. 



,, Alix, p. 441. 



M. caudi-ilio-Jlexorius. Gadow, No. 25." 



N 



